基于裂纹驱动推挤加工工程陶瓷新方法及刀具磨损研究  

Study of tool wear and of new methods push processing engineering ceramics based on crack driving

作　　者：王望龙[1] 王龙[1] 田欣利[1] 唐修检[1] 王健全[1] 

机构地区：[1]装甲兵工程学院装备再制造技术国防科技重点实验室,北京100072

出　　处：《金刚石与磨料磨具工程》2014年第5期29-34,共6页Diamond & Abrasives Engineering

基　　金：国家自然科学基金(51105378);国防"十二五"预研项目(51318020210);再制造技术国防科技重点实验室基金项目(9140c850301130c85289)

摘　　要：基于边缘效应驱动裂纹软推挤加工工程陶瓷是一种新的加工方法。为实现工程陶瓷等硬脆材料的高效、低成本加工,通过试验研究了加工过程中车刀进给速度、凸缘厚度、槽深三个重要加工参数对车刀磨损的影响规律。结果显示:基于边缘效应驱动裂纹软推挤加工,能充分发挥裂纹扩展的高速度、低能耗特点,从某种程度上实现了软的刀具加工硬度比它高的材料。切削实验表明:随着车刀轴向进给速度增大,车刀的磨损量减小;但当凸缘较厚时,进给速度过大可能会使车刀发生崩刃,凸缘厚度越厚,其断裂强度越好,所以车刀磨损增加;槽深越深时,断裂强度变差,车刀磨损减小;但随深度增加,车刀与材料接触增大,车刀磨损曲线折回,呈缓慢增大趋势。Driving crack push based on the edge effect processing engineering ceramics is a new processing methods. To achieve high-efficient, low-cost processing of engineering ceramics and other brittle materials, we looked into three important process parameters, namely feed rate, flange thickness and groove depth as well as their influence on turning worn. The results showed that driving crack could fully utilize the crack propagation of high-speed, low-power characteristics, to some extent to achieve a soft tool processing material whose hardness was higher than tool＇s material. Cutting experiments showed that with increasing axial feed rate, the amount of wear turning decreased; but when the flange was thicker, large feed rate might cause tool chipping. The thicker the the flange thickness was, the better the breaking strength was. Therefore, the tool wear increased. The deeper the groove depth was, the worse the breaking strength was, so was the turning tool wear reduction; but with increasing depth, the contact of turning tool with the material increases, turning tool wear curves turn back, shows a slowly increasing trend.

关 键 词：工程陶瓷 边缘破碎 裂纹扩展 推挤加工 刀具磨损 

分 类 号：TG58[金属学及工艺—金属切削加工及机床] TG74